Rhinoplasty is one of the most difficult facial plastic surgery procedures and refining the tip is the most complex part of rhinoplasty. In the case of a bulbous nose tip, this can be caused by a variety of factors, but usually starts with cartilage that is broad and too widely spaced. I would usually approach this is an open manner, shave down the cartilage and suture it together. If the overlying skin is very thick, it will need to be thinned. At times the cartilage is mal positioned and overly curved. In this case, the cartilage will need to be reoriented and straightened with cartilage grafting. The exact procedures necessary will depend on the patient's anatomy and what he or she hopes to achieve. Whether the patient is Caucasian, African-American, Asian, or another ethnicity may also influence the surgery, as anatomy and cartilage composition can vary considerably among the races. Please find a facial plastic surgeon with expertise in tip anatomy. I hope this helps.